Steam trap



Sept. 13, 1927.

'r. HAIGHT STEAM TRAP 3 Fg led May 13, l925 INVENTOR 777200095 xVA/G/YT.

v ATTORNEY the raised position.

Patented Sept. 13, 1 927.

UNITED stares: sATENT OFFICE.

mnnononn HAIGHT, or BROOKLYN, NEW YORK.

' STEAM TRAP.

Application filed May 13, 1925. 'Serial No. 29,942.

Among the principal objects which .the present invention has in view are: to avoid the temporary incapacity to which traps of the general character herein indicated are at the present'subjected; to prevent waters of condensation gaining access to the float member ,of the apparatus thereby waterlogging the same; to eliminate condensates of any charaoterwhich may gain access to the float member; to avoid frictional interferencewith the operation of the apparatus;

to expel from the-apparatus, and particularly from the float member thereof, dead air and deleterious gases; to readily and quickly remove or replace the working parts of the apparatus; to preserve the alinement of the assembled parts; to-avoid collapsing the float member by the pressure within the trap; and to simplify and'cheapen the construction. I

' Drawings.

Figure 1 is a vertical longitudinalsection of a trap constructed and arranged in ac- I cordance with the present invention.

Figure 2 is a horizontal section of the same the section being taken as .on the line 22 in Fig. 1. 1 i i Figure 3 is a perspective. view of the valve and seat therefor by which the delivery from,

the trap is controlled.

Figure- 4 is a detailed view in section showing a fragment oflthe valve and mountmg therefor, the view being takenas on the line Hin Flg. 3. In this view the supporting arm of the float member. is shown in 7 its lowered position.

Figure 5 is a secti section being taken as on the line 5-5 in Fig; 3, the supporting. arm, for the. float member being shownin broken lines and in Figure 6. is a. detail viewishowing fragments ofthe valve and .of the connectlng body. therefor, a part of there0f.-;. :Fignre T is adetailed view showing a fragment of the valve seat. I

" pee -wean.

In the accompanying drawings, invene onal view in detail, the

Fig. 3 of the drawings.

7 saidfbody being. cut away to show the interior.construction:

tion is disclosed as embodied in a steam trap, for a drainage system, and to this end the inlet 12 is threaded to receive the drainage pipe while the outlet of the trap 13 is provided in the passage .14 formed in the rec-I tangular extension 15 of the hollowed valve seat body 16. This construction is best shownin Figures 1 and 3 of the drawings.

17 which as shown is bolted in place. The hand hole referred to is made sufliciently large to pass the hollow globe 18 which constitutesthe float member of the apparatus,

also'the valve seat body 16 and the hollow extensions 19 thereof, can be passed through this opening. Thls 1s arranged in this manner so that the valve operating mechanism can be withdrawn or inserted at will, by the removal of the cover 17.

The valve mechanism conslsts prlmarlly of valve seats 20 formed in the. extensions 19. Theseats 20 have a series of perfora tions 21. The seats are semi-cylindrical'to form'bearings for segmental valve rods 22 and the supporting 'gudgeons 23 extended from the connecting and spacmg body 2 1.

The gudgeons 23 are extended from the 'A. hand hole is normally closed by a cover 1 and The valve-'members are'held upon their 2 seats by clips 26 which are shaped to fit over the gudgeons 23 to. retain the same and parts connected therewith in service position. The screws 27 or other suitable devlces are employed for holding the clips 26 in service.

The rectangular extension 15 is inserted from the inside of the receptacle 13 through a squared opening in the'trap body. An ex- 1 1 tended end 28 is threaded to receive a pipe I -.coupling 29, which when setup against the side of the receptamle 13, draws the extension 15 firmly in the perforation. It will be noted that the opening thus formed in the trap will be firmly and completely closed if properly machined or otherwise treated will render the joint steam-tight.

By reference to Figures 1 and 3 of the drawings it will be seen, the extensions 19 and body 16 are hollow and communicate with the delivery outlet 1%, therefore, it is obvious that when the valve rods are The globe 18is preferably constructed of copper, brass or other suitable material, preferably non-corrodible. It is operatively connected with the spacing body 2-1 by the tubular arm 29, the ends of which are threaded to engage the threads in the extension St). with whichthe body 24 is provided, and the nipple 31 extendedfrom the globe 18.

The globe 18' floated by any water of condensation which gains admission to the receptacle 3. hen in the position shown by full. line; in Figure 1 the drawing, the valve rods 22 are disposed as shown in Figure 3 of the drawings, and steam which may have found admission to the trap is pre vented from passing therefron'i by way of the hollow extensions 11) andthe passage 11. In this manner the steam pressure in the receptacle 1?) is maintained substantially equal to the pressure on the main. When, how-- ever. the globe is lifted to a position approxinnitely that shown by broken lines in Fig. 1, the *alve rods are disposed in subtant-ially the position shown in Fig. 5 of the drawing where the perforations 21 are exposed. In this position the water c mtained in the receptacle 13 is rapidly driven off. the pressure of steam within the trap aiding in this evacuation. As the water re cedes. the globe 1S descends from the position shown by broken lines in Fig. 1 to that shown by full lines in said figure, thereby closing the perforations 21 by means of the valve rods I-Ieretofore, difiiculty has been experienced by the globes 1S collapsing under steam pressure, or for other causes such as a'too sudden lift of the globe striking against the side of the trap to dent or destroy the globular shape ofthe walls and thereby rendering the same sensitive and liable' to collapse." To

avoid this 1 have placed in the globe a pipe 32 by means of which steam can enter from the body of the-receptacle 13within the globe 18. By thus equalizingtliepressures internally and externally the globe is prevented from collapsin A shield 33 is mounted on the globe 18 as seen best in Figures 1 and 2 of the drawings. The shield may be constructed in any suitable manner. I prefer one having the 'aised ridges 34. which form steam passageways for the steam leading to the pipe 32. It will be noticed that the passageways thus formed, open away from the inlet 12 and thus provide for avoiding the admission of water which anay enter or How oil the globe 18 from the said inlet.

From the foregoing it will be seenthat the dii'hculties heretofore experienced from the collapsing of the float 111en1bers',with the consequent loss of flotation, 1S avoided. Also it will be noted that by reason of the rectan ular extension" 15 and the receiving orihjce provided in" the body of the tank therefor and the perfect alineinent secured for the globe by means of the spacing body 24;, and the inner ends of the'extensions 19,

the globe 18 is held from striking the sides of the receptacle 13 in the oscillations of the globe when functioning.

As steam enters the globe 18 and is brought in contact. with the relatively cooler snrface which is immersed iirthe water held in the trap, it naturally condenses. IQIIIOVG'tlIlS water of condensation -lrom the globe 18 andthereby maintain the buoyancy of the said globe that I employ the pipe The pipe 35 has a vertical loop, the upper or looped end of which is held adjacent the pipe 32 at the normal top ofthe globe. The short leg of the loop 36 has a horizontal extension which is littedilito the globe spud 315 which engages the arm 29, the passages in both the arm 29 and thepipe 35 registeril'rg.

and being in open connnunication.

The spacing body 2 1 and theextension 30 thereof, are bored and threzided to receive the arm 29. At the lower end of the bore, two passages indicated by the numerals 'l' and 38 respectively, arediilledtln'ough the said body and the gndgeons 23 thereof.-

These passages 37 and 38 when operatively disposed, register with passages- 39 and 40 in the valve seats. 20 and particularly the portion thereof whichformthe bearingsfor the gudg'eons 23. and 5 of the drawings, 38 register with the passages 39 and 10, re-

spectively, when the arm 29 isin tlielowered and the liftedpositions, respectively.

When the globe 18 is disposed as shown in Fignrel of the drawings,- the passagefi? is registered with the passage 39. Anywater now contained in the said globe is under pressure'ofthe steam in tliereceptaele 13 and globe. This pressure'lift sthe water throughthe pipe 35 and the 100p36driving the same therethrough into the arm 29 and through the paissages-sr' and 39 to 'the intef'lbif 0f one As shown in Figures 1 the passages 37 and of the extensions 19 from whence the water escapes through the outlet 14. It is to prevent the receiving end of the pipe 35 becoming closed that I have cut the same on an an gle as shown in the drawings. In this manner the flotation of the globe is automati cally maintained.

It sometimes happens that air and incondensible gases become trapped within the float and interfere with the proper functioning thereof. The purpose of the passages 38 and L0 is to permit the same to pass from the globe 18 when the said passages arein registry. This occurs when the globe is in the elevated position shown by broken lines in Fig. 1. The said gases co mingling with the steam are carried through the pipe 35, loop 36, pipe 29 and passages 38 and 40 into the interior of the extension 19 which it will be seen at this time is filled with flowing water entering through the perforations 21. The air, gases and steam enter the body of the water and are carried thereby through the outlet 14.

In this manner the accumulation of undesirable gases in the float member or globe 18 is prevented.

It is obvious that if at any time it becomes necessary to remove the float member and the valve mechanism associated therewith, this is easily accomplished by removing the cover 17the steam supply having of course been first cut offand removing the clips 26, the

" q'lobe 18, spacing body 24, and rods 22, may

be simply removed by lifting the rods 22 from their seat. It is obvious that the replacement or renewal of the parts is as usuabove the delivery end of the said pipe must necessarily trap any steam, air or gas in the globe. When the pressure of the water in the globe and on the trapped air or steam equals the pressure of the steam in the trap, the

, introduction of water must cease as the two forces equalize. In this condition, however,

there is always sufficient buoyancy to the globe to float, and in this manner there is avoided any possibility of drowning or flooding the globe to impair its buoyancy.

Claims.

1. A steam trap comprising a receptacle for condensed liquid in open communication with a supply of pressure medium; a valve member for controlling an outlet from said receptacle; operating means for said valve member, said' means embodying a thin walled flotation member operable in the presence of said pressure supply, means for limiting the quantity of moisture to be admitted to the flotation member, and means for admitting said pressure supply to the interior for equalizing the pressure on the walls of said flotation member, said means embodying an inlet pipe extending from thetop of said flotation member to near the bottom thereof, said inlet pipe being shaped in correspondence with the path of movement of said flotation member. 2. A steam trap comprising a receptacle for condensed liquid in open communication with a supply of pressure medium; a'va-lve member for controlling an outlet from said receptacle; and operating means for said valve member, said means embodying a thin walled flotation member operable in the presence of said pressure supply, said pressure supply being admitted to the interior for equalizing the pressure on the walls of said flotation member; and means for eliminating any liquid. from said flotation member, said means embodying a tubular member adapted to be placed in open communication with the outlet from said receptacle and having a vertically disposed loop, the lower end of which is held adjacent the lowermost portion of said flotation member, while the upper end of which isdisposed adjacent the uppermost portion of said flotation member, and registering passages, one associated with, to be moved in unison with said flotation member, and the otherin the valve seat for delivery to said outlet when said flotation member is in itslowered position.

THEODORE HAIGHT. 

